Craig Mayer, Nick WIlliams, Vojtech Huser
Lister Hill National Center for Biomedical Communications, National Library of Medicine, NIH, Bethesda, MD

See the full regCTG repository at https://github.com/lhncbc/CRI/tree/master/regCTG

To return to the list of conditions and links to their rpeorts go to https://lhncbc.github.io/CRI/regCTG/regCTG-condition_report_links.html


Study Counts

Type Study_count
Total_Studies 2117
interventional 1829
Observational 282
Registry 6

Studies over Time

```

Interventional Trials

Intervention Type

intervention_type Study_Count
Drug 677
Drug|placebo 423
Behavioral 306
Other 115
Device 100
Behavioral|Other 38
Behavioral|Drug 25
Procedure 19
Drug|Other 17
Dietary Supplement|placebo 14
Behavioral|Device 10
Dietary Supplement 10
Behavioral|Drug|placebo 9
Device|placebo 9
Device|Drug 5
Drug|Other|placebo 5
Drug|Procedure 5
Combination Product 4
Other|placebo 4
Biological 3
Genetic|Other 3
Behavioral|Drug|Other 2
Behavioral|Procedure 2
Device|Other 2
Diagnostic Test 2
Genetic 2
Other|Procedure 2
placebo 2
Behavioral|Biological|Diagnostic Test 1
Behavioral|Device|Drug 1
Behavioral|Device|placebo 1
Behavioral|Diagnostic Test|Other 1
Behavioral|Drug|Other|placebo 1
Behavioral|Drug|placebo|Radiation 1
Behavioral|Drug|Procedure 1
Behavioral|Other|Procedure 1
Combination Product|Drug 1
Dietary Supplement|Drug 1
Drug|placebo|Procedure 1
Drug|Radiation 1
NA 1
placebo|Procedure 1

Count of Studies by Intervention (normalized and mapped)

Interventions over Time

Weekly studies for each intervention

Studies by Country

Country Study_Count
United States 757
NA 203
France 72
Canada 65
China 64
Germany 60
Taiwan 44
Spain 35
United Kingdom 35
Denmark 30
Korea, Republic of 27
Israel 25
Japan 25
Brazil 17
India 15
Hong Kong 14
Australia 13
Norway 12
Switzerland 8
Italy 7
Pakistan 6
Turkey 6
United States|Puerto Rico 6
Egypt 5
Finland 5
Netherlands 5
United States|Canada 5
Austria 4
Belgium 4
Ethiopia 4
Japan|Korea, Republic of|Taiwan 4
Sweden 4
Croatia 3
South Africa 3
United States|Bulgaria|Korea, Republic of|Malaysia|Philippines|Romania|Russian Federation|Ukraine 3
United States|India 3
Germany|Switzerland 2
Iran, Islamic Republic of 2
Ireland 2
Israel|Romania 2
Japan|Korea, Republic of|Malaysia|Taiwan 2
Jordan 2
Malaysia 2
Mexico 2
Moldova, Republic of 2
Poland 2
Portugal 2
Tanzania 2
Thailand 2
United States|Argentina|Australia|Colombia|Finland|France|Hungary|India|Korea, Republic of|Mexico|Romania|Russian Federation|Sweden|United Kingdom 2
United States|Bulgaria 2
United States|Bulgaria|China|Czech Republic|Italy|Japan|Russian Federation 2
United States|Bulgaria|Latvia|Russian Federation|Serbia|Ukraine 2
United States|Bulgaria|Serbia|Ukraine 2
United States|Croatia|Latvia 2
United States|Croatia|Russian Federation 2
United States|France|Italy|Russian Federation|Serbia|Slovakia|South Africa 2
United States|Hungary|Romania|Russian Federation|Ukraine 2
United States|India|Romania|Russian Federation|Ukraine 2
United States|Israel 2
United States|Ukraine 2
Argentina 1
Argentina|Austria|Croatia|Germany|Mexico|Portugal|Romania|Russian Federation|South Africa 1
Argentina|Brazil|Germany|Mexico|Philippines|Taiwan 1
Argentina|Colombia 1
Argentina|Croatia|India|Russian Federation|Serbia|Ukraine 1
Argentina|Egypt|Estonia|France|Greece|Jordan|Latvia|Lebanon|Lithuania|Romania|Slovakia|South Africa|Spain|Turkey 1
Argentina|Hong Kong|Italy|Poland|Russian Federation|Ukraine 1
Australia|Austria|Belgium|Bulgaria|Czechia|Denmark|France|Germany|Israel|Italy|Netherlands|Poland|Romania|Spain|Switzerland|United Kingdom 1
Australia|Austria|Norway 1
Australia|Belgium|Brazil|Croatia|Czech Republic|Mexico|Slovakia|Spain 1
Australia|Canada|Hong Kong|Korea, Republic of 1
Australia|China|Hong Kong|Korea, Republic of|Malaysia|New Zealand|Philippines|Taiwan|Thailand 1
Austria|Belgium|Bulgaria|Czechia|Denmark|Germany|Greece|Hungary|Israel|Italy|Netherlands|Norway|Poland|Romania|Spain|United Kingdom 1
Austria|Belgium|Bulgaria|Germany|Romania|Spain 1
Austria|Belgium|Czech Republic|France|Germany|Greece|Hungary|Italy|Spain|United Kingdom 1
Austria|Czech Republic|Denmark|Finland|France|Germany|Spain|Sweden|United Kingdom 1
Austria|Czech Republic|Finland|France|Germany|Hungary|Poland|South Africa|Sweden|Switzerland|Turkey|United Kingdom 1
Austria|Denmark|Germany|Italy|Spain 1
Austria|Norway 1
Belgium|Brazil|Bulgaria|Costa Rica|Finland|Germany|Italy|Mexico|Portugal|Romania|Russian Federation|Spain|Switzerland|Turkey 1
Belgium|Bulgaria|Croatia|Czech Republic|Austria|Egypt|Estonia|France|Germany|Greece|Hungary|Israel|Jordan|Korea, Republic of|Lithuania|Poland|Romania|Russian Federation|Slovakia|South Africa|Spain|Taiwan|Turkey|Ukraine|United Kingdom 1
Belgium|Bulgaria|Croatia|Denmark|Finland|France|Germany|Greece|Hungary|Israel|Latvia|Lithuania|Netherlands|Poland|Portugal|Russian Federation|Serbia|Spain|Sweden|Switzerland|Turkey|United Kingdom 1
Belgium|France|Germany|Hong Kong|Italy|Poland|Taiwan|Thailand 1
Belgium|France|Netherlands|Portugal|Spain 1
Belgium|Germany|Russian Federation|Slovakia|Sweden 1
Belgium|Netherlands 1
Brazil|Chile 1
Brazil|Colombia|Mexico 1
Brazil|Romania|Turkey 1
Bulgaria 1
Bulgaria|Croatia|Czech Republic|Austria|Denmark|Estonia|France|Germany|Greece|Hungary|Ireland|Israel|Latvia|Lithuania|Poland|Portugal|Romania|Saudi Arabia|Slovakia|Slovenia|Spain|Sweden|Turkey|United Kingdom 1
Bulgaria|Czech Republic|Germany|Hungary|Norway|Romania|Slovakia|South Africa|United Kingdom 1
Bulgaria|Estonia|Germany|Hungary|Latvia|Poland|Ukraine 1
Bulgaria|Estonia|Germany|Hungary|Latvia|Ukraine 1
Bulgaria|Greece|India|Indonesia|Philippines|Romania|Russian Federation|South Africa 1
Bulgaria|Poland 1
Bulgaria|United States|Austria|Belgium|Chile|Croatia|Estonia|France|Hungary|Italy|Korea, Republic of|Poland|Puerto Rico|South Africa|Thailand 1
Canada|Colombia|Czech Republic|France|India|Lithuania|Romania|Russian Federation|Serbia|Slovakia|South Africa|Ukraine 1
Canada|Croatia|Czech Republic|France|Hungary|Netherlands|Poland|Romania|Russian Federation|South Africa|United Kingdom 1
Canada|Finland|Germany|Hungary 1
Canada|Russian Federation 1
Canada|United Kingdom 1
Chile 1
China|Hong Kong 1
China|Hong Kong|Taiwan 1
China|Japan|Korea, Republic of|Malaysia|Philippines|Russian Federation|Taiwan|Ukraine 1
China|Korea, Republic of|Malaysia|Taiwan 1
Croatia|Denmark|France|Germany|Greece|Israel|Korea, Republic of|Malaysia|Netherlands|Russian Federation|Saudi Arabia|Spain|Taiwan|Turkey|United Kingdom 1
Croatia|France|Germany|Israel|Lithuania|Poland|Romania 1
Croatia|United States|Argentina|Brazil|Chile|Israel|South Africa|Thailand 1
Czech Republic 1
Czech Republic|Estonia|Finland|France|Poland 1
Czech Republic|France|Hong Kong|Indonesia|Philippines|Poland|Spain|Thailand 1
Czech Republic|Germany|Poland|Slovakia|United Kingdom 1
Czech Republic|United States|Argentina|Australia|Austria|Belgium|Brazil|Bulgaria|Canada|China|France|Germany|Greece|Hungary|Japan|Korea, Republic of|Mexico|Poland|Portugal|Romania|Russian Federation|Slovakia|Spain|Sweden|Taiwan|Ukraine 1
Czechia|Germany 1
Denmark|Finland|France|Greece|Israel|Norway|Slovenia|Sweden|Switzerland|United Kingdom 1
Denmark|Finland|Iceland|Switzerland 1
Denmark|Germany 1
Egypt|Greece|Jordan|Kuwait|Lebanon|Saudi Arabia|South Africa|Turkey|United Arab Emirates 1
Finland|Turkey 1
France|Hungary|Latvia|Romania|Russian Federation 1
France|Monaco 1
France|Switzerland 1
France|Tunisia 1
Germany|United Kingdom 1
Ghana 1
Greece 1
Hungary 1
Hungary|Israel|Spain 1
India|Korea, Republic of|United States|Bulgaria|Croatia|Philippines|Romania|Russian Federation|Serbia|Slovakia|Taiwan|Ukraine 1
India|United States|Argentina|Australia|Bulgaria|Chile|Croatia|Estonia|Finland|Hungary|Korea, Republic of|Malaysia|Mexico|Philippines|Poland|Puerto Rico|Romania|Russian Federation|Serbia|Slovakia|South Africa|Spain|Taiwan|Thailand 1
India|United States|Colombia|Romania|Russian Federation|Ukraine 1
India|United States|Malaysia|Russian Federation|Ukraine 1
Ireland|United Kingdom 1
Italy| 1
Macedonia, The Former Yugoslav Republic of 1
Montenegro 1
Poland|Romania|United Kingdom 1
Poland|United States|Bulgaria|Canada|Czechia|Estonia|Finland|Mexico|Romania|Russian Federation|Serbia|Slovakia|Spain|Ukraine 1
Poland|United States|Bulgaria|Czechia|Germany|Italy|Spain|Ukraine 1
Puerto Rico 1
Romania|United States|Costa Rica|Korea, Republic of|Mexico|Russian Federation|South Africa|Taiwan|Ukraine 1
Russian Federation 1
Rwanda 1
Serbia 1
Singapore 1
Spain|Serbia|United States|Bulgaria|Canada|Czechia|Hungary|Poland|Russian Federation|Ukraine 1
Spain|United States|Brazil|Canada|Chile|Germany|Latvia|Lithuania|Netherlands|Poland|Slovakia|Taiwan|Turkey|Ukraine 1
Tunisia 1
Turkey|Austria|Belgium|Croatia|Denmark|Estonia|France|Germany|Greece|Hungary|Israel|Latvia|Lithuania|Netherlands|Portugal|Spain|Sweden|Switzerland|Ukraine|United Kingdom 1
Uganda 1
Ukraine|Bulgaria|Estonia|Korea, Republic of|Lithuania|Malaysia|Romania|Russian Federation|South Africa|Taiwan 1
Ukraine|United States|Bulgaria|Russian Federation|Serbia 1
Ukraine|United States|Russian Federation|Serbia 1
United Kingdom|United States|Argentina|Australia|Brazil|Colombia|Italy|Mexico|Poland|Romania|Russian Federation|Ukraine 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Croatia|Czech Republic|France|Germany|Hungary|Israel|Italy|Mexico|Netherlands|Poland|Portugal|Puerto Rico|Romania|Russian Federation|Slovakia|South Africa|Spain|Sweden|Taiwan 1
United States|Argentina|Australia|Austria|Belgium|Bulgaria|Chile|Croatia|Estonia|Finland|France|Hungary|India|Korea, Republic of|Malaysia|Mexico|Norway|Philippines|Poland|Puerto Rico|Romania|Russian Federation|Serbia|Slovakia|South Africa|Spain|Taiwan|Thailand 1
United States|Argentina|Australia|Belgium|Canada|Colombia|Germany|Italy|Mexico|Poland|Romania|Russian Federation|Singapore|Spain|Ukraine|United Kingdom 1
United States|Argentina|Australia|Brazil|Bulgaria|Czechia|France|Hong Kong|Hungary|India|Italy|Korea, Republic of|Malaysia|Mexico|Poland|Russian Federation|South Africa|Spain|Taiwan|Turkey|Ukraine 1
United States|Argentina|Australia|Brazil|Canada|Germany|Mexico|Poland|Russian Federation|Serbia|Singapore|Spain|Ukraine 1
United States|Argentina|Austria|Brazil|Germany|Ireland|Mexico|Peru|Puerto Rico|Spain|United Kingdom|Venezuela 1
United States|Argentina|Belgium|Brazil|Bulgaria|Germany|Spain 1
United States|Argentina|Brazil|Canada|France|Greece|Portugal|Puerto Rico|Romania|Slovakia|Spain|Taiwan 1
United States|Argentina|Bulgaria|India|Malaysia|Mexico|Philippines|Romania|Russian Federation|Serbia|Slovakia|Taiwan 1
United States|Argentina|Canada|Czech Republic|Estonia|France|Hungary|Latvia|Lithuania 1
United States|Argentina|Colombia|Czech Republic|Slovakia|Ukraine 1
United States|Argentina|Russian Federation 1
United States|Australia|Bulgaria|Canada|Estonia|Finland|Germany|Hungary|Italy|Latvia|Lithuania|Spain 1
United States|Australia|Canada|France|New Zealand|United Kingdom 1
United States|Austria|Brazil|France|Germany|Hungary|Japan|Mexico|Poland|Russian Federation 1
United States|Austria|Bulgaria|Czech Republic|Estonia|France|Germany|Hungary|India|Lithuania|Poland|Russian Federation|Spain|Ukraine 1
United States|Austria|Bulgaria|Ireland|Israel|Italy|Poland|Puerto Rico|Serbia|Ukraine|United Kingdom 1
United States|Austria|Canada|Germany|Italy|Japan|Korea, Republic of|Poland|Spain|Taiwan|United Kingdom 1
United States|Austria|Germany|Ireland|Israel|Italy|Poland|Spain|Ukraine|United Kingdom 1
United States|Belgium|Bulgaria|Colombia|France|Hungary|Korea, Republic of|Malaysia|Mexico|Philippines|Poland|Puerto Rico|Romania|Russian Federation|Spain|Ukraine|United Kingdom 1
United States|Belgium|Bulgaria|Croatia|Israel|Korea, Republic of|Malaysia|Slovakia|South Africa|Spain|Taiwan 1
United States|Belgium|Bulgaria|Estonia|Finland|India|Korea, Republic of|Poland|Romania|Russian Federation|Ukraine 1
United States|Belgium|Costa Rica|Czech Republic|India|Peru|Russian Federation 1
United States|Belgium|Croatia|Korea, Republic of|Malaysia|Poland|Slovakia|Spain|Taiwan|Thailand 1
United States|Belgium|Germany|Greece|Netherlands|Poland 1
United States|Brazil 1
United States|Brazil|Canada|Chile|Germany|Latvia|Lithuania|Netherlands|Poland|Slovakia|Spain|Taiwan|Turkey|Ukraine 1
United States|Brazil|Germany|Greece|Spain|Turkey 1
United States|Brazil|Israel|Korea, Republic of|Mexico|Puerto Rico|Russian Federation 1
United States|Brazil|Mexico 1
United States|Brazil|United Kingdom 1
United States|Bulgaria|Canada|Czechia|Estonia|Mexico|Poland|Romania|Russian Federation|Serbia|Slovakia|Spain|Ukraine 1
United States|Bulgaria|Canada|Czechia|Hungary|Lithuania|Poland|Russian Federation|Serbia|Spain|Ukraine 1
United States|Bulgaria|Canada|Czechia|Hungary|Lithuania|Poland|Russian Federation|Serbia|Ukraine 1
United States|Bulgaria|Colombia|France|Hungary|Korea, Republic of|Malaysia|Mexico|Philippines|Poland|Puerto Rico|Romania|Russian Federation|Spain|Ukraine 1
United States|Bulgaria|Croatia|India|Korea, Republic of|Philippines|Romania|Russian Federation|Serbia|Slovakia|Taiwan|Ukraine 1
United States|Bulgaria|Czech Republic 1
United States|Bulgaria|Korea, Republic of|Malaysia|Poland|Puerto Rico|Romania|Russian Federation|Serbia|Taiwan|Thailand|Ukraine 1
United States|Bulgaria|Poland 1
United States|Bulgaria|Poland|Ukraine 1
United States|Canada|Colombia|Croatia|Japan|Korea, Republic of|Latvia|Malaysia|Mexico|Philippines|Poland|Puerto Rico|Romania|Russian Federation|Serbia|Slovakia|Taiwan|Turkey|Ukraine 1
United States|Canada|France|Japan|Korea, Republic of|Spain|Taiwan 1
United States|Canada|Germany|Japan|Taiwan 1
United States|Canada|Japan|Korea, Republic of|Latvia|Poland|Romania|Serbia|Ukraine 1
United States|Canada|Mexico|Netherlands|Puerto Rico 1
United States|Canada|United Kingdom 1
United States|China 1
United States|China|Israel 1
United States|Colombia|Croatia|Mexico|Philippines|Russian Federation|Slovakia|Taiwan 1
United States|Colombia|India|Lithuania|Philippines 1
United States|Colombia|India|Romania|Russian Federation|Ukraine 1
United States|Colombia|India|South Africa 1
United States|Colombia|Korea, Republic of|Malaysia|Mexico|Romania|Turkey|Ukraine 1
United States|Colombia|Malaysia|Puerto Rico|Romania|Serbia|Turkey|Ukraine 1
United States|Colombia|Romania|Russian Federation|Slovakia|Ukraine 1
United States|Estonia|Poland|Romania|Russian Federation|Serbia|Slovakia|Ukraine 1
United States|France|India|Malaysia|Romania|Russian Federation|Ukraine 1
United States|Germany|India|Malaysia|Philippines|Poland|Russian Federation|Serbia|South Africa|Ukraine 1
United States|Germany|Mexico|Russian Federation 1
United States|Germany|Ukraine 1
United States|Greece 1
United States|Hungary|Romania|Russian Federation|Serbia|Ukraine 1
United States|India|Malaysia|Moldova, Republic of|Philippines 1
United States|India|Malaysia|Philippines|Poland|Russian Federation|Serbia|South Africa|Ukraine 1
United States|India|Malaysia|Philippines|Romania|Russian Federation|Taiwan 1
United States|India|Malaysia|Russian Federation|Ukraine 1
United States|India|Romania 1
United States|India|Romania|Russian Federation|Slovakia|Spain|Ukraine 1
United States|India|Romania|Slovakia|Ukraine 1
United States|India|Russian Federation|Ukraine 1
United States|India|Taiwan 1
United States|India|Ukraine 1
United States|Israel|Italy|Spain 1
United States|Japan 1
United States|Korea, Republic of|Malaysia|Romania|Russian Federation|Serbia|Taiwan|Ukraine 1
United States|Mexico 1
United States|Poland|Puerto Rico|Russian Federation 1
United States|Puerto Rico|Russian Federation 1
United States|Romania|Russian Federation|Slovakia|Ukraine 1
United States|Romania|Russian Federation|Ukraine 1
United States|Russian Federation 1
United States|Russian Federation|Ukraine 1
United States|Russian Federation|United Kingdom 1
United States|Taiwan 1
Vietnam 1

Sites per Study

Site_count Study_Count
1 1200
2 152
3 47
4 41
5 26
6 22
7 13
8 24
9 11
10 7
11 8
12 10
13 6
14 6
15 11
16 10
17 7
18 3
19 2
20 10
21 8
22 8
23 3
24 6
25 3
26 6
27 7
28 4
29 5
30 2
31 7
32 4
33 6
34 4
35 4
36 2
37 4
38 2
39 4
41 3
42 5
43 5
44 1
45 3
46 5
48 6
49 4
50 1
51 1
52 2
53 1
54 4
55 1
56 3
57 4
58 1
59 1
60 3
61 3
62 1
63 1
64 3
65 5
66 2
67 1
69 2
71 2
72 2
73 4
74 2
75 1
76 1
80 1
81 1
82 1
83 1
84 1
86 1
87 2
88 1
90 2
92 1
94 1
98 2
99 1
101 1
102 1
103 1
106 1
107 1
110 1
113 1
116 1
117 1
120 1
122 3
124 1
129 2
138 1
141 1
147 1
148 1
157 1
177 1
214 1
236 1

Phase

Phase Study_Count
N/A 671
Phase 4 335
Phase 3 296
Phase 2 233
Phase 1 208
Phase 2/Phase 3 42
Phase 1/Phase 2 30
Early Phase 1 14

Number of Arms

Number_of_Arms Count_of_Studies
1 268
2 895
3 242
4 107
5 21
6 11
7 5
8 7
9 2
10 1
12 2
NA 268

Number of Updates

Count of Versions Count of Studies
1 141
2 202
3 233
4 224
5 167
6 136
7 121
8 86
9 82
10 68
11 42
12 51
13 31
14 22
15 20
16 24
17 14
18 15
19 14
20 13
21 5
22 7
23 10
24 8
25 3
26 5
27 4
28 4
29 6
30 3
31 3
32 4
33 5
34 5
35 4
36 5
37 3
38 3
39 1
40 3
41 4
43 1
44 4
45 1
46 1
47 1
48 2
50 1
51 1
53 1
54 1
56 1
57 2
58 1
59 1
70 1
76 1
80 1
82 1
83 1
85 1
86 1
102 1
106 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 12817 1688 7.593009
Contacts/Locations 5819 1424 4.086376
Recruitment Status 2600 1440 1.805556
Study Design 2154 1283 1.678878
None (earliest Version on record) 1829 1829 1.000000
Outcome Measures 1591 946 1.681818
Sponsor/Collaborators 1445 830 1.740964
Arms 1282 825 1.553939
Interventions 1282 825 1.553939
Study Identification 1264 749 1.687583
Eligibility 1161 739 1.571042
Study Description 1126 702 1.603989
Oversight 843 686 1.228863
References 700 377 1.856764
More Information 421 221 1.904977
Results 390 390 1.000000
Conditions 373 296 1.260135
IPDSharing 195 178 1.095506
Baseline Characteristics 150 124 1.209677
Results Submission Events 112 112 1.000000
Reported Adverse Events 85 75 1.133333
Participant Flow 75 68 1.102941
Documents 57 52 1.096154
2020 Study Status 1 1 1.000000
Quality Control Review has not concludedReturned: June 23 1 1 1.000000

Enrollment Metrics by Phase

Measure Early.Phase.1 N.A Phase.1 Phase.1.Phase.2 Phase.2 Phase.2.Phase.3 Phase.3 Phase.4
Min. 2.0000 1.0000 4.00000 10.00000 5.0000 0.0000 1.0000 10.0000
1st Qu. 33.5000 38.0000 24.00000 31.00000 40.0000 45.0000 120.0000 40.0000
Median 55.0000 69.0000 40.00000 49.00000 86.0000 72.0000 300.0000 79.0000
Mean 260.0714 132.4857 54.40887 59.24138 141.6987 126.3171 386.7201 202.4377
3rd Qu. 73.7500 120.0000 65.00000 75.00000 220.0000 161.0000 493.0000 198.0000
Max. 2700.0000 10347.0000 328.00000 160.00000 880.0000 512.0000 9809.0000 18239.0000

Trial Group Type

group_type Group_Count
Experimental 1812
Active Comparator 795
Placebo Comparator 532
NA 268
Other 154
No Intervention 127
Sham Comparator 106

Intervention Model

intervention_model Study_Count
Parallel Assignment 1259
Single Group Assignment 351
Crossover Assignment 167
Factorial Assignment 29
NA 16
Sequential Assignment 7

Primary Purpose

primary_purpose Study_Count
Treatment 1434
Basic Science 95
Other 68
NA 60
Prevention 47
Health Services Research 46
Supportive Care 45
Diagnostic 29
Screening 4
Device Feasibility 1

Observational Studies

Studies by Country

Country Study_Count
United States 87
NA 38
France 17
Spain 15
Korea, Republic of 14
China 10
Canada 9
Taiwan 7
Israel 6
Norway 6
Denmark 5
Italy 5
Netherlands 5
Belgium 4
Greece 4
Croatia 3
Germany 3
Hong Kong 3
Hungary 3
Russian Federation 2
Switzerland 2
Thailand 2
Turkey 2
United States|Canada 2
Australia 1
Australia|Czech Republic|France|Italy|Russian Federation|Spain|Turkey 1
Austria 1
Austria|Finland|Germany|Netherlands 1
Belgium|France|Germany|Hungary|Italy|Spain|United Kingdom 1
Brazil|Mexico 1
Bulgaria 1
Canada|Czech Republic|Denmark|Kazakhstan|Sweden|Thailand|Ukraine 1
Croatia|Russian Federation|Turkey 1
Egypt|Saudi Arabia|United Arab Emirates 1
France|Germany|Greece 1
France|Germany|Italy|Spain 1
Germany|Belgium|Bulgaria|Denmark|Greece|Israel|Kazakhstan|Russian Federation 1
Germany|Greece|Netherlands|Spain 1
Hungary|Latvia|Romania 1
India 1
Italy|Argentina|Brazil|Canada|France|Germany|Spain|United Kingdom 1
Latvia 1
Portugal 1
Romania 1
Singapore 1
Slovenia 1
Sweden 1
Turkey|Czech Republic|France|Germany|Greece|Russian Federation|South Africa|Spain 1
United Kingdom 1
United States|Australia 1
United States|Canada|Israel|Singapore|United Kingdom 1
United States|France|Russian Federation 1

Sites per Study

Site_count Study_Count
1 197
2 10
3 8
4 5
5 1
6 5
7 5
8 2
9 1
10 3
11 3
12 1
13 1
14 4
15 2
16 1
17 2
18 2
19 1
20 2
24 1
25 2
32 1
33 2
34 2
35 1
37 1
39 1
41 1
43 1
44 1
46 1
48 1
52 1
53 1
57 1
61 1
65 1
67 1
88 1
99 1
107 1
148 1

Number of Updates

Count of Versions Count of Studies
1 25
2 28
3 42
4 38
5 30
6 22
7 12
8 13
9 9
10 7
11 6
12 1
13 4
14 4
15 2
16 4
17 2
18 2
22 3
23 2
24 1
25 1
26 1
27 1
30 1
31 1
32 2
34 2
37 1
39 1
56 1
59 1
67 1
76 1
89 1
96 2
123 1
125 1
126 1
132 1
170 1
172 1
189 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 3105 257 12.081712
Contacts/Locations 783 208 3.764423
Study Description 570 96 5.937500
Study Design 385 193 1.994819
Recruitment Status 335 204 1.642157
None (earliest Version on record) 282 282 1.000000
Eligibility 218 112 1.946429
Sponsor/Collaborators 170 116 1.465517
Study Identification 123 78 1.576923
Outcome Measures 122 87 1.402299
Oversight 109 77 1.415584
Groups 100 68 1.470588
Interventions 100 68 1.470588
References 96 41 2.341463
Conditions 59 41 1.439024
IPDSharing 15 13 1.153846
Results 10 10 1.000000
More Information 5 4 1.250000
Baseline Characteristics 3 3 1.000000
Documents 3 3 1.000000
Participant Flow 2 2 1.000000
Reported Adverse Events 2 2 1.000000
Results Submission Events 2 2 1.000000

Enrollment Metrics

Measure Observational
Min 1.000
1st Qu 72.000
Median 193.000
Mean 6555.119
3rd Qu 595.250
Max 751725.000

Observation Model

observational_model Study_Count
Cohort 96
NA 56
Case-Only 43
Case-Control 33
Case Control 19
Other 12
Defined Population 8
Ecologic or Community 6
Family-Based 6
Defined Population, Natural History 2
Case-Crossover 1

Time Perspective

time_perspective Study_Count
Prospective 156
Cross-Sectional 51
Retrospective 31
NA 18
Other 15
Longitudinal, Retrospective/Prospective 6
Cross-Sectional, Prospective 2
Cross-Sectional, Retrospective 2
Longitudinal, Prospective 1

Registries

Studies by Country

Country Study_Count
China 3
United States 2
Spain 1

Sites per Study

Site_count Study_Count
1 6

Number of Updates

Count of Versions Count of Studies
1 1
2 1
3 1
4 1
11 1
16 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 31 5 6.200000
Sponsor/Collaborators 12 2 6.000000
Contacts/Locations 11 3 3.666667
None (earliest Version on record) 6 6 1.000000
Study Description 5 2 2.500000
Outcome Measures 4 4 1.000000
References 4 1 4.000000
Eligibility 3 2 1.500000
Recruitment Status 3 2 1.500000
Study Design 3 2 1.500000
Groups 2 1 2.000000
Interventions 2 1 2.000000
IPDSharing 2 2 1.000000
Conditions 1 1 1.000000
Oversight 1 1 1.000000

Enrollment Metrics

Measure Registries
Min 30.000
1st Qu 144.250
Median 538.500
Mean 1217.833
3rd Qu 2075.000
Max 3600.000

Registry Model

observational_model Study_Count
Case-Control 3
Cohort 2
Case-Only 1

Time Perspective

time_perspective Study_Count
Prospective 5
Cross-Sectional 1

Follow-up

target_duration Study_Count
8 Weeks 3
15 Months 1
2 Days 1
24 Months 1